The Mii Brawler represents Kunio, the main playable character of the River City series who specializes in physical combat.
The Mii Brawler's white Toad Outfit represents Kunio's fighter uniform, which features a white color scheme.
The stage represents the main setting of the River City series, which mainly takes place in a metropolitan city.
The music track represents the musical theme of Mach Rider, which was first released on the NES along with the River City series.
The Battering Type items reference the battering weapons used during the River City series fights.
The Food item (Onigiri) and the Mii Brawler's stats increasing after eating the food reference the onigiri in the River City series, where eating one can increase Kunio's stats.
The Mii Brawler's favored Flashing Mach Punch references Kunio's usage of his signature move, the similarly named Mach Punch.
